JPS63309324A - Production of tube having deflecting thickness - Google Patents

Production of tube having deflecting thickness

Info

Publication number
JPS63309324A
JPS63309324A JP14590687A JP14590687A JPS63309324A JP S63309324 A JPS63309324 A JP S63309324A JP 14590687 A JP14590687 A JP 14590687A JP 14590687 A JP14590687 A JP 14590687A JP S63309324 A JPS63309324 A JP S63309324A
Authority
JP
Japan
Prior art keywords
tube
metal tube
thickness
metal
cold drawing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP14590687A
Other languages
Japanese (ja)
Inventor
Yuji Katayama
Masayuki Fukuda
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SHOWA KOKAN KK
Nabco Ltd
Original Assignee
SHOWA KOKAN KK
Nabco Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SHOWA KOKAN KK, Nabco Ltd filed Critical SHOWA KOKAN KK
Priority to JP14590687A priority Critical patent/JPS63309324A/en
Publication of JPS63309324A publication Critical patent/JPS63309324A/en
Granted legal-status Critical Current

Links

Abstract

PURPOSE: To easily produce a metal tube having a partially large thickness inside the tube by inserting an inner tube into a prescribed part on the inner surface of the metal tube, fixing the inner tube with another metal tube in the metal tube, then, performing a cold drawing with a die only.
CONSTITUTION: A tube end mouthpiece is provided for a gripper part at the time of the cold drawing at an end of a metal blank tube having a specific thickness and a specific outer diameter before the metal tube is annealed and pickled. Then, the cold drawing is carried out to obtain a metal tube 6 having a prescribed outer diameter and a prescribed inner diameter, and to insert into the metal tube an inner tube 7 having an outer diameter slightly smaller than the inner diameter of the metal tube 6. This inner tube 7 is held by a tube having another small diameter in the metal tube 6, then a cold drawing by a die only is performed to make a metal tube which is small in inner diameter and large in thickness at the inner tube section 7. Then, when the metal tube having a small diameter is removed, a metal tube partially different in thickness can be remarkably easily produced.
COPYRIGHT: (C)1988,JPO&Japio
JP14590687A 1987-06-11 1987-06-11 Production of tube having deflecting thickness Granted JPS63309324A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14590687A JPS63309324A (en) 1987-06-11 1987-06-11 Production of tube having deflecting thickness

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14590687A JPS63309324A (en) 1987-06-11 1987-06-11 Production of tube having deflecting thickness

Publications (1)

Publication Number Publication Date
JPS63309324A true JPS63309324A (en) 1988-12-16

Family

ID=15395799

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14590687A Granted JPS63309324A (en) 1987-06-11 1987-06-11 Production of tube having deflecting thickness

Country Status (1)

Country Link
JP (1) JPS63309324A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016132009A (en) * 2015-01-20 2016-07-25 株式会社三五 Manufacturing method of uneven thickness pipe

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016132009A (en) * 2015-01-20 2016-07-25 株式会社三五 Manufacturing method of uneven thickness pipe

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